ASTM D1578-93(2016)
Standard Test Method for Breaking Strength of Yarn in Skein Form

Standard No.
ASTM D1578-93(2016)
Release Date
1993
Published By
American Society for Testing and Materials (ASTM)
Status
Replace By
ASTM D1578-93(2022)
Latest
ASTM D1578-93(2022)
Scope

5.1 Test Method D1578 for testing any spun yarn for breaking strength is considered satisfactory for acceptance testing of commercial shipments since the method has been used extensively in the trade.

5.1.1 In case of a dispute arising from differences in reported test results when using Test Method D1578 for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens which are as homogeneous as possible and which are from a lot of material of the type in question. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using Student's t-test for unpaired data and an acceptable probability level chosen by the two parties before testing is begun. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results in the light of the known bias.

5.2 This test method is not suitable for yarns that stretch more than 58201;% when the force is increased from 2.5 to 7.5 mN/tex or 0.03 to 0.08 gf/denier, because (a ) they require special precautions as to tension in reeling, and (b) users of such yarns are more interested in their elastic behavior at low forces than in their ultimate breaking strength.

5.3 For Option 1, it is advisable to use a tensile testing machine of the proper capacity to break skeins with 80 turns. If it is necessary to break skeins having only 40 or 20 turns, convert the observed results to an 80-turn basis by multiplying by factors of 2 or 4, respectively. (The available literature does not show that any significant error is introduced by the use of these factors.)

5.4 The circumference of the skeins used to determine the breaking load is not critical, and as a consequence, close control of the tension at which the skeins are wound is not necessary. If, however, the same skeins are to be used to determine yarn number for any purpose, the skeins must be reeled under controlled tension on a reel meeting the requirements given in Test Method D1907.

5.5 For some purposes it may be advisable to convert the skein breaking strength observed for yarn of one number to the estimated skein breaking strength of a different yarn number. Factors for making such a conversion for cotton yarns are given in 11.2. No corresponding factors have been developed for yarns spun from other fibers.

5.6 The results obtained from different options are not fully comparable because the breaking force per wrap increases slightly as the perimeter of the skein is reduced. The skein brea......

ASTM D1578-93(2016) Referenced Document

  • ASTM D123 Standard Terminology Relating to Textiles*， 2023-09-14 Update
  • ASTM D1776 Standard Practice for Conditioning and Testing Textiles*， 1998-04-20 Update
  • ASTM D1907 Standard Test Method for Linear Density of Yarn (Yarn Number) by the Skein Method*， 2001-09-10 Update
  • ASTM D2256 Standard Test Method for Tensile Properties of Yarns by the Single-Strand Method*， 1997-04-20 Update
  • ASTM D2258 Standard Practice for Sampling Yarn for Testing*， 1999-04-20 Update
  • ASTM D2904 Standard Practice for Interlaboratory Testing of a Textile Test Method that Produces Normally Distributed Data *， 1997-04-20 Update
  • ASTM D4849 Standard Terminology Related to Yarns and Fibers*， 2021-06-15 Update
  • ASTM D76 Standard Specification for Tensile Testing Machines for Textiles*， 1999-04-20 Update

ASTM D1578-93(2016) history

Standard Test Method for Breaking Strength of Yarn in Skein Form


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